Safety-envelop.



I -0. L. WEIMAR.

SAFETY ENVELOP. APPLICATION FILIED JUNE 13, 1913.

Patented Nov. 4, 1913.

UNi j s'rA'rEs PATENT orl roa.

o'rro 'r..'-fsvamn., or PHILADELPHIA, rENNs'YL-vANIA.

'SAFETY-ENVELOP.

To all whom it may concern:

Q a citizen of the United States, residing-at Philadelphia, in thecounty of Philadelphia and State of Pennsylvania, have invented new anduseful Improvements in Safety-Envelops, of which the following is aspecification. 1

This invention relates to safety envelope; and it has for its object theprovision of a device ofthis character which will include a mainretaining device on the hack folds of the envelop and a locking memberconnected for rotation in one direction only with said member andadapted to positively cause the sealing flap to be interposed betweensaid second member and theadjacent flap of'the envelop and therebypositively prevent the With the above and other objects in view,

sealing flap from being opened without detectio...

the invention consists of certain novel features of constructlon,combinatwn and arrangemcnt of parts, as will be hereinafter des ribedand claimed.

In the accompanying drawings:-Figure 1 is a rear view of a portionof theenvelop, showing the application of the invention thereto; Fig. 2 is avertical section there-- through; Fig. 3 is a perspective view of one ofthe members-of the fastener; Fig. 4 is a perspective view of the othermember of the fastener; Fig. 5 is a perspective view of the spring disk;and Fig. 6 is a section, showing a slightly modified form of the device.

The envelop 1 herein shown is provided with the usual overlapping backflaps 2 and a sealing flap 3, the latter in the present in- 'll.e'portions 10 and 11 of the lug are provided with oppositelybeveled andsubstantially cam surfaces 12, the' lower ends 'of'j. which beingdisposed substantlally on a line I with the wall 13 of the kerf- 9.

The disk 5 described in the foregoingi V Specification of Letters''Patent.

. Patented Nov. 4,1913.

intimation filed June 13, 1913. Serial No. 773,481.

I p forms one of the cooperating members of Be it known that I,OTTO-*LwWEIMARg ranged with its medial portion alined with the threadedopening 20 in said disk 15.

From this construction it is evident that the sealing flap 3 may bedrawn over the open end of the envelop in the usual manner and the lug 7of the disk 5 projected into the passage 4 of. the sealing flap. Theoppositely beveled ends 12 of the portions 10 and 11 of the lug are thenlocated beyond the sealing flap and the threaded portion of the lugdisposed so that the companion or coiiperating member 14 of the devicemay be rotated on the lug and the spring 19 advanced over the surfaces12 and then finally locked in the kerf 9. The surfaces 12 permi t themember 14: to be rotated in one direction only, and, as a consequence,when the sealing flap is in a secured position by reason of itsconfinement by the cooperating members of the fastener it cannot drawnto a released position without being entirely destroyed.

In the modified form of the device shown in Fig. 6, the member 1 1 isthe equivalent of the member 14 in the preferred embodiment. Thediiference in this form ofthe invention resides in the fact that theshell 18 is swiveled at 21 to a metallic mounting Q2 and the member 14directly carried by the sealing flap 3 x From the foregoing description,taken in connection with the accompanyihg draw ings, the constructionand operation of the invention will be readily understood withoutrequiring a more extended explanation.

Various changes in the form, proportion and the miiior details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advan- I tages of this invention as claimed.

Having thus. described my invention,

A fastener for envelope comprising a member secured to the envelop andprovided with a threaded stud'disposed in the closing path of thesealing flap and adapted to be projected therethrough and provided within a confined condition'betweenboth mem- 10' a kerf and operativelyinclined surfaces at bers of the fastener. the sides of the kerf, and a,threaded mem- In testimony whereof I-a-ffix my signature beradjustableon the stud and having a in presence of two- Witnesses.

5-yie1dab1e ortion operable over said oppositely incl ed surfaces andadapted to be OTTO WLIMAR' projected into the kerf soes to hold theWitnesses:

second member against removal from the v HELEN G. DALEY,

first member and to retain the sealing flap THEODORE ROSEMANNS.

flopis of this patent 'niay be obtained for five cents eaeh,byaddressing the "Commissioner of Patents. I

' Washington, D. O. i

